Exhaust ventilator



P. R. JORDAN EXHAUST VENTILATOR Filed Feb. 15. 1926 2 Sheets-SING. 1

fyzi.

Oct. 16; 1928.

W M W E I INVENTOR: 2 WfiWVM Patented Get. 1 6, 1928.

P-AUIJv R. JORDAN, OF INDIANAPOLIS, INDIANA.

EXHAUST VENTILATOR.

Application filed February '15, 1926. Serial m. 88,403.

This invention relates to the ventilation of I buildings, especially thoseof the larger class, such as school buildings, and has reference more particularly to an appliance that is designed for Controlling and regulating outflow of air from buildings under the infiuenceof air currentspassing over the tops of the buildings.

7 An object of the invention is to provide an improved exhaust ventilator appliance which shall be of such construction as to be adapted to be readily applied to the top of an airduct, and which shall be adapted to afiord the advantages without entailing the disad vantages of rotary ventilator appliances.

Another object is to provide an improved ventilator appliance which shall be mainly stationary with internal co-operatingvalves constructed and arranged to enable the appliance to operate efliciently under the controlling influence of atmospheric air currents, equally as well with shifting currents as with constant currents.

A further object is to provide an improved exhaust ventilator appliance which shallbe 01": such construction as to be of simple design permitting low cost of manufacture, and which shall be highly efiicient, durable and reliable, noiseless in operation and economical in use, and also have a pleasing appearance.

With the above-mentioned and other ob jects in view, the invention consists in an exhaust ventilator appliance of novel construction generally, including novel valves and mounting thereof; the invention consisting also further in the novel partsand combinations and arrangements of parts as hereinalter particularly described, and further defined in the appended claims.

Referring to the drawings,-Figure 1 is a vertical central section of the ventilator appliance in which the valves thereof are free to act; Fig. 2 is a fragmentary vertical central section of the appliance in which the valves are restrained from action and heldin closed position to operate as a damper; Fig. 3 isa fragmentaryhorizontal section in proximity to the top of the structure and broken away on different planes to expose lower parts; Fig. 4 is an elevation view of the appliance on a reduced scale; and Fig. 5 is a top plan of the appliance on a further re.- duced scale. v

Similar reference characters in the different figures of the drawings indicate correspondmg elements or features of construction herein referred to in detail.

In the drawings the numeral 1 indicates the roof of a building and 2 the terminal portion ofian air-duct extending through the roof from the interior of the building.

The improved ventilator appliance comprises a neck 3 adapted to be connected with thetop of the air-duct, the neck or at least the upper portion thereof being rectangular in cross-section, the housing part of the appliance preferably being rectangular in plan so as to permit economical manufacture. The housing has a plurality of apertures in its side portions, preferably four in number, and

accordingly the housing isprovided with a bottom or floor. comprising four inclined sections 4, 4, 4*, 4, the sections being connected to the top of the neck 3 and extend ing outwardly and downwardly therefrom. Four vertical partitions 5, 5 5, 5, are connected to the bottom or floor on the lines of junction of the sectionsthereof, to direct air currents into the housing. In some cases corner posts 6 and 6 are secured to the outer edges of the partitions to stiffen them and constitute facing members, being connected with flanges 7 formed on the bottom sections. A pyramidal roof 8 is secured to the tops of the partitions and preferably 'hasa downwardly extending face flange: 9 connected with the corner posts. The upper portion ofeach bottom section hasan outwardly facing valve seat member 10 thereon which is connected structurally to the neck 3, defining thebottom of the apertures, the seatmember being adapted 'for preventing flow partitions having similar supports 13' and 14, therebeing a pair-of supports at the top line of each aperture or throat at the inner ends of the partitions, the space be:- tween each two partitions affording a mouth channel to'direct air currents to the valve the valve'is open. the plate 19, being angular relatively to the plate 18 extends slightly outwardly at an inclination opposite to that of the valve seat and its lower end has a water-shed flange 20 projectingoutwardly,

' and the back of the plate 19 has a felt packing 21 thereon to insure tight contact with the valve seat members and to deaden sound that may be caused by the valve when closing against the seat. Each valve has also a tapered lever plate 22 extending'up ward from the fulcrum portion, and the top of the lever plate has-a relatively angular balancing plate 23 extending inwardly towards the middle of the housing and preferably is provided with a Weight element 24: to counter-balance the valve so as to normally hold the valve in open position yet permitting it to be closed by slight external air-pressure. Above the pivot supports in each mouth channel the opposite partitions are provided with two wings 25 and 26 respectively against the backs of which the lever plate 22 comes into contact when the valve is closed which with the valve plates entirely close the adjacent apertures in a side of the housing. A suitable number of stop bars 27 are secured to the top of the roof 8 to limit the opening movement of the valves.

In order to cheaply provide a damper to close or regulate the ventilator a lift plate 28 is provided and arranged below the ends of the balancing "plate v23 that operate as lever members, andthe lifting plate may be variously supported and operated,' preferably by means of two cables 29 and 30 connected at one end to the lifting plate and extending over pulleys 31 suitably supported by the roof 8, the cables extending from the pulleys downward through suitable openings in the lift plate and to a counterweight 32 to which the cables are secured, the counterweight being adapted by the force of gravity to pull up the lifting plate into engagement with the plates 23 and to push them up so as to close the valves. A chain 33 is connected to the lifting plate and extends downward through the counterweight whereby to pull the lifting, plate downward more or less and permit normal operation of the valves either fully or to any desired degree. The chain is provided at its lower end with suitable means for fastening. it in proper position,-

such as a hook 34 attached to the chain which may be connected to any suitably arranged anchorage.

In practical use,the ventilator housing being stationary, an air-current coming from such direction as to enter one of the mouth channels creates air-pressure on the plates 18 and 19 of the valve therein, exerting force also on the flange 20 and forces the valve against its seat. 3111 case the air-current moves so'as to enter two adjacent mouth channels, the valves in both channels are closed by the air-pressure against the action of the counterweights of the valves. The

valves in the opposite side of the housing are automatically opened by their counterweights under normal conditionsand' permit outflow of air through the housing, the outflow obviously being accelerated because of suction produced by atmospheric air-currents flowing past the ventilator which tend to create vacuum in the housing through the rearward open valve. When conditions make it desirable to use the ventilator damper the chain 33 is released and consequently the lifting plate 28 is drawn upward into engagement with all the plates 23, resulting 1n the shifting of the valves to closed position or so as to be nearly closed to permit limited degree of ventilation.

lVhatis claimed as new is:

- 1. An exhaust ventilator including a pyramidal bottom having a quadrangular opening therein, the upper portion of the bottom having outward-facing valve seats thereon, a neck connected to the upper portion of said bottom, four partitions secured radially upon said bottom, a roof secured to the tops of the partitions, and four valves pivotally supported above the valve seats respectively, by

the partitions and movable by external aira pressure to the seats.

2. An exhaust ventilator comprising a hollow neck, a floor comprising four inclined Y sections secured at their upper portions to the neck and having outward-facing valve seats'on their tops, four upright partitions radially secured to the floor at the junctions of the sections thereof, a roof secured to the tops of the partitions, four valves pivotally supported above the valve seats respectively to co-operate with the seats in response to external air-pressure, each valve having acounterbalancedlever normally operating to open the valve, a pulley supported by the roof, a cable movably supported by the pul ley, a lifting plate arranged below the valve levers and secured to one end of the cable, a weight element arranged below the lifting plate and secured to the opposite end of the cable and adapted to lift the plate and thereby raise all the levers to close the valves, and a pull-chain connected to the lifting plate and provided with means to anchor it.

'3. In an exhaust ventilator, the ccimbina tion of a housing comprising a pyramidal bottom having a quadrangular opening therein, the upper portion of the bottom having outward-facing valve seats thereon, four partitions secured radially upon said bottom, a pyramidal roof secured to the tops of the partitions; and four valves arranged each between two of the partitions, each valve comprising a horizontal fulcrum por-- tion provided at its ends with pivot pins that are supported on the two partitions, a valve plate extending downwardly and outwardly from the fulcrum portion and having a relatively angular portion to co-operate with the adjacent one of the valve seats, and a tapered lever plate extending upward from said ful I PAUL R. JORDAN. 

